ARIZA is a bug/request tracking tool coded with PHP in an AJAX approach. It works with favorite DBMS such as PostgreSQL and MySQL. It is being distributed under GPL licence. It is free (as in beer) and free (as in speech) and open source.Features of ARIZA - Bug/Request Tracking Tool:- Multi language support- Theme support with Smarty- Multi platform support ...

Olate is a software development company specialising in products designed for the web written using PHP. As a company, it produces three products, one of which is an open source download manager called Olate Download.

Flyspray is an uncomplicated, web-based bug tracking system for assisting with software development, written in PHP. It was originally conceived when the Psi Jabber client project couldn't find a bugtracker that suited their needs, and has been made available for everyone to use for their own projects. Features of Flyspray:- Web-based, platform-independent- Multiple database support, currently MySQL and PGSQL- Easy ...

S-BTS is a PHP web based bug tracking system. It helps you manage software development. It uses a database to store issues to be done, bugs to be fixed, and features to be added.S-BTS is based on 100% all-PRADO framework.

CodeTrack: Web-based Bug Tracking, a system for reporting, managing, and tracking bugs and other issues on multiple projects over the web. Admin is minimal; all that's required is a generic Apache + PHP4/5 box. Bug data are stored as native XML -- no database or mail server needed!

PMtool is a project management software (based on PHP+MySQL) to create tasks for change/bug requests, post timesheets, and calculate number of times used.There is a PostgreSQL port coming along shortly.